posix: fix parameter name in signals test
posix: fix parameter name in signals test

Change-Id: I6e998571171c9a725d88a9529c73d01c62ee984f
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/1905146
Reviewed-by: Mark Mentovai <f1b5a91d4d6ad523f2610114591c007e75d15084@chromium.org>
Commit-Queue: Joshua Peraza <f5809a5e35ec7e1bd0e25cb0a0b68bb433cf6f17@chromium.org>

chromium/crashpad,chromium/crashpad,chromium/crashpad